Arc lamp



Sept 25 1934. l. F. HuMMoN, .JR 1,974,537

ARC LAMP Filed May l5, 1929 2 Sheets-Sheet l J0 :EIG-

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Sept 25, 1934- l l. F. HuMMoN, JR 19,974,537

ARC LAMP Filed May 13. 1929 2 Sheets-Sheet 2 teners 21 to the plates 18-19 and the casing 16 to constitute a xed connection therebetween. An elongated metallic bar 22 extends between the insulator plates 18 and 19 along a vertical median 5 line thereof for secural thereto at its extremities by means of any suitable fasteners 23, thereby rigidly sustaining the insulator plates 18 and 19 in a vertical aligned position to support ray generating instrumentalities as will hereinafter more 1i) clearly appear.

material, in this instance of substantially triangular shape, is slidably associated with the bar 22 to move therealong. To this end the mount 24 is provided with a guide slot adapted to accommodate the bar 22 which in conjunction withv a metallic member 26 xed to the rear face thereof having an insulation 27 therebetween serve as electrical contact members and guides for the` mount 24. The contact members 22 and 26 extend at lleast for the Y limits of movement desired of ber ofvelectrodes 28, in this instance two, may

be sustained by the mount 24V which is provided with metallic cup members 29'to' vertically support correspondingly shaped, in this instance cylindrical, carbon electrodes 28. I

30 The cupmembers 29'are -provided with axial apertures in the bottom walls thereof to enable ready cleansing and the removal of the electrodes therefrom.` Electrical conductors 31 and 32 extend between vthe cups- 29'and the Contact bars A22 and 26, respectively, to establish a sldable electrical connection therewith. The conductor 31 is however, in this instance permanently connected or secured to a looped member 33 which depends from the mount 24 to serve as a fulcrum for a pivotal lever 34. The pivo-tallever 34 has an angular-extension which frictionally en'- gagesthe contact bar 22 to sustain the mountV 24 in any vertical adjusted position. Through this'medium the conductor 31 establishes an elec- 5't`rical connection with the contact'bar 22. The pivotal member 34 through its extension 35 may, however, engage lany other part'of the ray generating instrumentality sustaining frame to maintain'the mount 24 in position when the conductor 50231 is arranged in direct slidable contact with the bar 22. This affords a connection of electrodes with the energy source in any vertical position of the mount 24 which is slidable to compensate for the electrode length reduction with the continued 55 iarcing activity thereof. An extension 36 on the mount 24 enables the convenient elevation thereof while its descent may be effected by depressing the pivotal lever 34 in a clockwise direction (viewed from Figure 4) to disengage its extension BOV-35 from the contact bar 22. l Confronting electrodes 37, in this instance two,

corresponding in number withthe electrodes 28,`

are positioned in arcirng confronting range therewith. To enabie momentary contact between 65 vJelectrodes 28 and 37 for initiating a current flow therebetween, a flexiblev mount l38 is provided for that purpose. The mount 38 is stamped or otherwise shaped from sheet material in the form of a strap'or clip, which is provided with a com- ?iparatively large loop- 39 to impart the Idesired flexibility and resiliency1 thereto. The looped extremity' 40 'thereof is fastened to the rear face An electrode mount 24 preferably of insulating edge thereof. The openings 40 communicate with the lower edge of the plate 18 through narrower openings defining throats 41 to enable the convenient insertion of the mount 38 in the openings 40 which serve as a support therefor.

The mount 38 is preferably branched to dene extensions 42 which project forwardly of the insulator plate 18, there being comparatively smaller loops 43 impressedtherein proximate to their slightly upwardly inclined electrode holder extremities 44. The mount extremities 44 are each provided with an aperture 45 to receive an electrode, in this instance a cylindrical carbon electrode 37, therethrough for frictional engagement in conjunction with arcuately grooved guides 46. 'Ifhe guides 46 are spaced for support on either side of the mount holder extremity 44 owing to curved'arms 47 which are struck from or preferably adhesively associated therewith in the vicinity of the branches 42 of the flexible metallic mount 38.

Y As a consequence of the 1oop 43 andthe inclination of the holder extremity 44, the electrode 37 which is disposed through the somewhat larger aperture45, is resiliently urged against the spaced guides 46 to constitute a frictional three-point support therefor. The smaller loop 43 lends less flexibility and elasticity 4than the comparatively larger loop 39 so that the electrodes 37 may be moved downwardly for momentary contact with the electrodes 28 without disengagement Vfrom their holders 44. To this end the holder extensions- 44, in this instance two constituting branches of the flexible strap mount 38, are interconnected by a transverse bar 49 which is in operative association with a'manual actuator 50. The actuator 50 comprises a rod which is secured to the bar 49 intermediate the ends thereof by means of a threaded stud or other fastener 51 so that the rod'50 may extend upwardly through an aperture in the shell or casing 16 to receive a handle 52 preferably of insulation material. Consequently the electrodes 37 may be urged downwardly for momentary contact with the electrodes 28 -by flexing the electrode mount 38 responsive to depressingthe handle 52. Release of the pressure on 'the handle 52 will automatically cause the electrodes 37 to recede from the electrodes 28 a predetermined distance conducive to continued arcing therebetween for producing ultra violet rays.

In view of the fact that these devices are -domestically employed for connection to ordinary lighting circuits, resistance units or elements are ordinarily used in conjunction and'in series with the ultra violet ray generating electrodes. These are particularly useful and beneficial for therapeuticY purposes either in the presence of the ultra violet rays or entirely independent thereof. VTo this end, the resistances, in this instance two 'carborundum rods 54, are' positioned vertically in parallel spaced relation within the focal region ofthe reflector shel1'16. These are detachably held by clipsV 55 which confront similarly shaped clips .56 secured tothe insulating plate mounts 18 and 19, respectively. As shown, the clips 55 are interconnected by an integral bar 57 which has aftab 58 formed thereon to enable its secural Ato the plate 18 with the same fasteners. 23 holding the bar 22 thereto. The lower clips 56 are in- 'sulated from each other for connection to the -line by wires 60 and 61 (Figurel. of the plate 18 for extension through correspond-1 ingly shaped openings 40', in this instance two,` 7gfprov1ded inthe plate 18 proximate tothe lower One of the lower electrodes 28 is connected to a terminal 62by a wire conductor 63 so that a two-way switch 64 mounted, in this instance, on

the base 10 may be utilized to selectively connect the power source with the electrodes 28-37 and the ballast resistances 54 in series or merely the resistances 54 independently thereof to generate infra red rays for therapeutic purposes. Although two sets or" electrodes 28-37, in this instance totalling four, are described and disclosed in the present embodiment, it is apparent that a single set of electrodes 28-37 or any number thereof may be employed depending upon the dictates of commercial practice. The clips 55 and 56 have cup-shapes or concavities at their extremities to yieldingly engage the resistor rods 54 so that they may readily be replaced without entailing any labor or inconvenience.

Various changes may be made in the embodiment of the present invention herein specically described "without departing from or sacrificing any advantages thereoic as defined in the appended claims.

I claim:

1. In an ultra violet ray device, an electrode holder, said holder comprising a flexible metallic strap, spaced guides on said strap adapted to receive an electrode, and an apertured extension on said strap effective to engage an electrode in conjunction with said guides ior maintaining its position relative thereto.

2. In an ultra violet ray device, an electrode holder comprising a flexible metallic strap, spaced guides on said strap for contact with an electrode, and an apertured yieldabie extension projecting between said guides to receive an electrode for rictional resilient engagement in conjunction with said guides.

3. In a device of the character described, the combination with a frame, of an electrode mount slidable relative to said trarne, electrical contact members on said frame along the path of the electrode mount movement, .a pluraity of electrode engaging means on said mount, electrical connections between said electrode engag ing means and contact members, and pivotal means on said holder for frictional engagement with said frame to maintain said holder mount in adjusted position.

4. In a device of the 4character described, the combination with a frame, of an electrode mount slidable relative to said frame, electrical contact members on said frame along the path or the electrode mount movement, a plurality of electrode engaging means corresponding in number with said contact members on said mount, electrical connections between said electrode engaging means and contact members, means to maintain said mount in adjusted position,`and a flexible electrode mount on said frame in confronting relation with said iirst named electrode mount.

5. In a device of the character described, the combination with a frame, of an electrode mount slidable relative to said frame, electrical contact members on said frame along the path of mount movement, a plurality of electrode engaging means corresponding in number with said contact members, said engaging means being on said mount, electrical connectors between said electrode engaging means and contact members, means to maintain said mount in adjusted position, a nexible electrode mount on said frame in confronting relation with said rst named mount, and means for ilexing said flexible mount for eiecting momentary contact between electrodes adapted to be carried by said mounts.

6. In a device of the character described, the combination with a reflector, of spaced carbon electrodes mounted within the eld of said reflector, means for impressing an electrical potential between said electrodes, resilient clips mounted in the field of said reflector, resistance units detachably sustained by said clips to serve as infra red ray generating means influenced by said reector, and switching means for selectively connecting said resistance units in series with said electrodes.

7. In a device of the character described, the combination with a reflector, of spaced carbon electrodes mounted within the eld of said reiiector, means for impressing an electrical potential between said electrodes, resilient clips mounted in the field of said reector, resistance rod units detachably sustained by said clips to serve as red ray generating means influenced by said reflector, and switching means for selectively connecting said resistance units in series with said electrodes.

8. In a device of the character described, the combination with a reflector, of spaced carbon electrodes mounted within the field of said reflector, means for impressing an electrical potential between said electrodes, resilient clips mounted in the eld of said reector, resistance rod units detachably sustained by said clips in parallel spaced relation to serve as infra red ray generating means inluenced by said reflector, and switching means for selectively connecting said resistance units in series with said electrodes.

IRV'IN F. HUMMON, JR. 

